iHeartMedia EVP/Global Music Marketing Alissa Pollack has been appointed Chair of the Musicians On Call Board of Directors as RIAA’s Mitch Glazier moves to Chair Emeritus. Additional board appointments include philanthropist Michelle Frohlich-Klinger (secretary) and Baker Sullivan Hoover PLC’s Cathy Sullivan (treasurer). Mack Real Estate Group’s Stephen Mack and music industry veteran Rome Thomas have been re-elected to the Board, and SCS Innovations’ Sara Star joins as the newest member.